Changeable picture plate holder for cameras



S. F. MYERS.

CHANGEABLE PICTURE PLATE HOLDER FOR CAMERAS. APPLICATION FILED JUNE 12, 1919.

1,435,6 1 7, Patented Nov. 14, 1922.

8 SHEETSSHEEY S. F. MYERS. CHANGEABLE PICTURE PLATE HOLDER FOR CAMERAS.

APPLICATION FILED JUNE I2, 1919- Patented Nov. 14, 1922.

3 SHEETS-SHEE'I 2.

s. F. MYERS. CHANGEABLE PICTURE PLATE HOLDER FOR CAMERAS.

. APPLICATION FILED JUNE 12' 1919. A

Patented Nov. 14, 1922.

3 SHEETS-SHE 3.

"ql 511E Petented Nov. 14, 1922.

UNITED STATES snIrLEY 1r. MYERS, or new YORK, N. Y.

CHANGMBLE PICTURE PLATE HOLDER IDB GAMEIAS.

Application filed June 18, M9. Serial Emmi".

T 0 (all whom it may concern Be it known that I, SHIRLEY F. Minuet a citizen of the United States, residing at New York in the county of New York and State of New Yonk, have invented certain new and useful Improvements in Change able Pictune Plate Holders for Cemeras, of which the following is "a specification.

'ihis invention relates to the production 0; signs or ies-mes of the changeable or vqiahle reading type, which exhibit diffemnt shots, to the angle at which they are viewed.

The objeets of the inw m ifln are to pro.- vide simple and effective apparatus far pmclosing the mulfiiplenimage "plates for such pictures 0! signs and to so eonstmot the apparatus that it may be readily applied to and used in connection with anordinury camera.

Aoeording to a pmiem'ed form, the in, vention is embodied in a plate holder which cau'beused with a camera in the usual way and consists of a lined screen shifts/sly mounted in the plate holder and having means by which it elm be shifted, after one exposure, to cover portions first exposed and to uncover the sensitized areas which were covered during such first exposure.

In this second position a second exposure can be made on the same plate and the two nna' con nod each to a sepmte set of lined areas on the plate.

Various other features and details of the invention will appm as the s moificar tion proeeeds.

thereof; Figure 3 is e bl oken front view;

and Figures 4 and 5 are edge views of the apparatus, on an enlarged scale; Figure 6 is 'a detail sectional view of the shiiting mechanism taken substantially on the plane of line 6-6 eat Figure 4; Figures 7 and 8 areseetienal views on an enlarged scale f will be separate and distinct, being the line semen and the sensitized medium or plate in back (If the same; Figure 9 is a WWW edge View of the plate holder showing the back cover partly opened; Figure 10 is a broken rear View on a, re? duced scale, showing the heck cover thrown all the way open to permit loading of the plate holder; Flgure 11 is a broken detail view of one of the semen shifting screws d a ts a a ther h; F r 12 is a e k n e ismal w ke o bste k tiull the plane of line of Figure 1,; s e l3. is s r ge detai v e s i th p mep P g r d n he Sweep d ith the ed sl5 designates the heme or box of the device, in the nature of a plate holder end'constroeted usually to fit a standard plate camera. This holder is shown prov ded with a hinged back 16 which can be thrown p as in e d n Figures 9 and l receive the sensitized medium 01' plate 17 wh ch is lodged between the shoulder 18 an p ng fine s 1 a h d a th b k by sprlng 20, 21 the front of the ol r, Shawn as I s de, h h a be Withdrawn when the exposures are to be made. I The-screen is indicated at 22 and the same is shown in the form of a glass plate disposed immediately in front-of the sensitized ium an p i d with c osely sp e narrow, r d al, a rnat y a spa ent and non-transparent lines or stripes 23 24, These alternate trqnsparent and nonmnsparent ellel stripes are termed preferably by grooving one face of the P a as y tch g, lwse o ved portio being left transparent end he $8 35 qf the intervening ribs or hlgh portions being treated to render theznnon-transparent wl-fl a indicated at 25 i i v1!?" 7 W 8. This screen is shown egrrie in a suit: able frame 26, mounted to slide la flrally in guides 27, the grooved face of the being disposed toward the face of the semi tized plate and substantially in contact therewith (Figure 12),

The feed seuews for shifting the screen are designated 28, 29, Quid screws engaging in stationary nut blocks 30 (Figure 11) and bearing at their inner ends on theedjacent edge of the screen f ame and at po nts our the top and bottom i sa d frame. These screws are cennectedto operate in unison by means misting 1n the :dlfifikk sure of crank arms 31, on the outer ends of the screws, connected by a link 32. The screws are of relatively fine pitch and so that an appreciable rotary movement of the screws will effect but a slight lateralmovement of the screen. Also the screws are of the same pitch and operating as they do in unison, they serve to simultaneously impart equal shitting movement to both the top and bottom portions of the screen, thereby maintaining the screen in a straight path and preventing any binding tendencies. Spring-pressed plungers 33 engaging the opposite edge of the screen, hold the screen firmly engaged with the bearing points of the feed screwsl The screen is shifted usually a distance equal to the widthof the lines or stripes thereon. This movement is gaged in the present disclosure by means of a slide 84, connected with one of the crank arms 31, by a link 35, so as to move proportionately with the screws, said slide working in guides 36 on the end of the main frame (Figures 3-6) and provided with stops 37, 88, for engagement with relatively stationary stop shoulders 89, 40. The cooperating stop shoulders may be made adjustable for the purpose of varying the stroke. In the illustration the stop 38 is shown as a block adjustably secured on the slide by a screw and slot connection 41. Assistance in the proper gaging of the movement is provided by a gage finger 42 overstanding the face of the slide, as indicated in Figures 4 and 5, the slide having suitable markings thereon for registering with this finger or pointer.

The feed screws may be operated by using the connecting link 32 as a reciprocating hand hold for imparting the turning movements thereto or a special hand hold 43 may be provided on the slide.

In practice the plate holder is loaded and after being placed in the camera in the usual way, the front slide 21 is withdrawn and the first exposure is made. In taking this first picture, the plate is exposed in narrow parallel stripes indicated at a l in Figure 7, in line with the transparent stripes of the screen, the intervening stripes or lines being covered by the nontransparent portions of the screen. After covering the plate the screen isshifted laterally, by the means described, a distance equal to the width of one line, thus uncovering the non-exposed areas and covering the lined areas which have just been exposed. A second exposure is then made, with the result that the second pic ture is produced on the stripes or lines a5 (Figure 8) between the stripes 44:, first exposed. Two distinct and separate pictures are thus produced on the same plate.

The apparatus, it will be seen, is comparatively simple and is, by reason of the fine pitch screw studs and the manner in which they are operated, particularly accurate and eiiicient.

1. In a camera attachment, a line screen, i'eed screws engaging said screen at separated. points, a crank arm on each of said feed screws and a link connecting said crank arms.

2. In a camera attachment, a line screen, feed screws engaging said screen at sepa rated points, a c-rank. arm on each of said feed screws, a link connecting said crank arms, and stop mechanism limiting the movement of said feed screws. I

3. In a camera attachment, a line screen, feed screws engaging said screen at separated points, a crank arm on each of said feed screws, a link connectin said crank arms, a slide connected to one o" the crank arms and stops limiting the movement of said slide.

4:. In a camera attachment, a line screen, feed screws engaging said screen at separated points, a crank arm on each of said feed screws, a link connecting said crank arms, a slide connected to one of the crank arms and a gage associated with said slide.

5. In a camera attachment, the combination of a line screen, feed screws operating on said screen at separated points, means for operating said feed screws in unison and means for gaging the movement of said feed screws. 7 i

6. In combination, ajplate holder, a line screen laterally shiftable in said plate holder, feed screws operating on said screen at relatively widely separated points, and link mechanism connecting said screws to move them in unison.

7. In combination, a plate holder, a line screen laterally shift-able in said plate holder, feed screws operating on said screen at relatively widely separated points, link mechanism connecting said screws to move them in unison, a slide connected with said link mechanism and stops limiting the move ment of said slide.-

8. In combination, a plate holder, a line holder, teed screws operating on said screen at relatively widely separated points, a crank arm on each of said feed screws, a link connecting said crank arms, a slide connected with one of the crank arms and cooperating stop shoulders onsaid slide and on a stationary part of the plate holder.

10. A plate holder comprising a frame and a back and a front cover one of which can be opened for the loading of the holder and the other for the exposure of the plate, a laterally shiftable screen mounted in said frame in front of the position to be occupied by the plate, feed screws entered through the side of the frame engagement with the screen and. means for operating said feed screws in unison.

11. A plate holder comprising a frame and a back and a front cover one of which can be opened for the loading of the holder and the other for the exposure of the plate, a laterally shiftable screen mounted in said frame in front of the position to be occupied by the plate, feed screws entered through the side of the frame into engagement with the screen. means for operating said feed screws in unison, and means for gaging the movement of the feed screws.

12. In a camera attachment a frame, a screen guided for lateral movement in said frame, spring-pressed plungersbearing on one edge of said screen for thrusting the same in one direction. feed screws bearing on the opposite edge of the screen and means for operating said feed screws in unison.

In testimony whereof I afiix my signature.

SHIPLEY F. MYERS. 

